Mary - I'd love to have a water feature too. Used to have a gazebo (before I moved to Calgary) and within it, as you came in the door, was a small pond to the left. Water trickled into it through a hose. When the pond filled, it trickled on the other end to a tiny stream bed, and at the end of the stream bed it flowed into a 2ft deep x 1 1/2 ft wide, by 4ft long pond. Apparently it was used by the previous owner to put fish in, but the raccoons and other animals were eating them so he stopped. When the pond got full, it flowed into an underground bin, and then to the pump which flowed through a hose underground and came up to feed into the first little pond . As this was on the outer edges of the gazebo we had room to put a cast iron table and 2 chairs and we would often sit there to have dinner, on a warm summer's evening.
The gazebo was made of split logs and had a trellis roof. It also had a window area (no covering or glass of any kind - just an opening, really). It was overgrown by grape ivy and was nice and cool on a hot day. The overall size was 7ft by 14ft. There were flagstones as the floor, and it was so peaceful to sit in there.